21276429143 has 2 divisors, whose sum is σ = 21276429144. Its totient is φ = 21276429142.

The previous prime is 21276429133. The next prime is 21276429157. The reversal of 21276429143 is 34192467212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21276429143 - 2²² = 21272234839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21276429143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21276429103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10638214571 + 10638214572.

It is an arithmetic number, because the mean of its divisors is an integer number (10638214572).

Almost surely, 2^21276429143 is an apocalyptic number.

21276429143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21276429143 is an equidigital number, since it uses as much as digits as its factorization.

21276429143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The spelling of 21276429143 in words is "twenty-one billion, two hundred seventy-six million, four hundred twenty-nine thousand, one hundred forty-three".